What legacy IVR really costs — against cloud CCaaS over three years.
For IT, CX and finance leaders defending a platform move. Includes migration cost and parallel run, the two lines that sink most CCaaS business cases after approval.
Your inputs
Benchmarks show typical enterprise ranges — override every field with your own numbers.
Benchmark: 500–5,000 in an enterprise estate
Premise or hosted licence, amortised subscription equivalent
Benchmark: $70–$140 per seat
Vendor support, hardware refresh, data centre, DR
Benchmark: $0.5M–$2M at this scale
Per-port or TDM circuits you retire on migration
Benchmark: $400k–$1.2M
What it costs today to change a prompt or a routing rule
Benchmark: $150k–$600k — usually invisible in the budget
Target tier including digital channels and WFM
Benchmark: $110–$185 for an AI-capable tier
Routing rebuild, integrations, data migration, testing, training
Benchmark: $1M–$3M for 1,000+ seats
Both stacks live — the most under-budgeted line in the case
Benchmark: 3–6 months typical
Steady-state legacy cost minus cloud cost, once migration and parallel run are complete.
Directional estimate. Assumes cloud retires premise maintenance, moves telephony to usage at 35% of the legacy line, and reduces change-request spend to 25% through configuration. AI containment value is modelled separately.
Three-scenario view
Finance reviewers expect a range. These scenarios flex adoption and implementation cost around the model you entered.
Slower adoption, higher integration effort
Your inputs as entered
Strong sponsorship, clean data, phased scale-up
How enterprise leaders use this model
- What does a legacy contact center actually cost to keep?
- More than the maintenance line suggests. Premise platforms carry hardware refresh, per-port telephony, vendor support, specialist contractors for IVR changes, and the opportunity cost of change requests that take weeks. This model asks for those separately so the comparison is honest.
- How long should we budget for parallel run?
- Most enterprise migrations run both stacks for three to six months — longer with complex routing, regulated recording or many integrations. Parallel run is the single most commonly under-budgeted line in a CCaaS business case, so it is an explicit input here.
- Should AI value be in the migration business case?
- Only the part the migration unlocks. Containment and agent-assist value depend on the AI programme, not the platform move — model that in the Contact Center AI calculator and reference it alongside. Here the AI line is limited to capability you cannot get on the legacy stack at all.
- Which platform should we migrate to?
- That depends on routing complexity, existing cloud commitments, CRM, and whether voice AI is native or integrated. We compare Genesys Cloud, NICE CXone, Amazon Connect, Five9 and others vendor-independently in the comparison library.